august's lisa stark for us in washington. thanks, lisa. >> metro north is part of the metropolitan transportation authority. the derailment was the fifth this year. in september, the m.t.a. named a committee to investigate the problem. three trains derailed on tracks this year, 76 people were hurt in may. a freight trail went off the rails in the bronx in july. with it the number one subway went off the rails in manhattan. for more on the investigation into the metro north train derailment, we are joined by todd curtis. mr. curtis thank you for being with us this morning. you've been following this investigation closely. >> you have a very wide range of organizations involved in this accident. typically, the ntsb brings in other organizations to help get to the bottom of an accident, but because of the tremendous resources within new york city and new york state, you have several safety organizations, not just the ntsb who are involved here. these organizations have had a long term interest as you said before in recall safety